Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 19, NWS Twin Cities, MN

May 28, 1991Dunn County, Eau Claire County, Pepin County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at May 28, 1991, 3:16 AM CDT for Dunn County, Eau Claire County, Pepin County, Wisconsin. It was in force for 59 min.

The area

The counties it named.

The facts

Issued
May 28, 1991, 3:16 AM CDT (08:16 UTC)
Expired
May 28, 1991, 4:15 AM CDT
In force
59 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Dunn County, WI, Eau Claire County, WI, Pepin County, WI

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 8.3 hours before the alert went out and 145 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 1991-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 806 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 1991-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -15 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
806 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
1288 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
-15 m²/s²
0-3 km storm-relative helicity
59 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMSP 280814
SVRMSP
WIC033-035-091-280915-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
316 AM CDT TUE MAY 28 1991
 
THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING     EFFECTIVE UNTIL  415 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION                        S...
 
IN WEST CENTRAL WISCONSIN
 
   ...SOUTHEASTERN DUNN COUNTY...WESTERN EAU CLAIRE COUNTY
   ...EASTERN PEPIN COUNTY
 
AT 315 AM RADAR INDICATED A SEVERE THUNDERSTORM 25 MILES SOUTHWEST OF
EAU CLAIRE NEAR DURAND. THE STORM WAS MOVING NORTHEAST AT 30 MILES AN
HOUR. CITIES IN THE PATH OF THIS STORM DURAND...ROCK FALLS...
CARYVILLE AND EAU CLAIRE.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1991Every severe thunderstorm warning in 1991

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.